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Finding the Fourth Proportional to 355,311.09, 490,327.49 and 210,169.01

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Solution

The fourth proportional to 355,311.09, 490,327.49 and 210,169.01 is: 290,032.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,311.09 : 490,327.49 = 210,169.01 : x
  2. Step 2: Convert to fraction form
    355,311.09/490,327.49 = 210,169.01/x
  3. Step 3: Cross multiply
    355,311.09x = 490,327.49 × 210,169.01
  4. Step 4: Simplify right side
    355,311.09x = 103,051,644,900.33
  5. Step 5: Solve for x
    x = 103,051,644,900.33/355,311.09
  6. Step 6: Final answer
    x = 290,032.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.